The present invention relates to novel isocoumarin derivatives inhibiting angiogenesis, a method for preparation thereof and pharmaceutical compositions comprising the said derivatives as pharmaceutically active ingredients. More particularly, the present invention relates to novel isocoumarin derivatives represented by formula (1), especially 6,8-dihydroxy-4-acetyl-isocoumarin, a method for preparing 6,8-dihydroxy-4-acetyl-isocoumarin from fungi, and pharmaceutical compositions comprising the compounds and/or 6,8-dihydroxy-4-acetyl-isocoumarin as pharmaceutically active ingredients, which would be effective for the treatment of angiogenic diseases such as cancers, rheumatoid arthritis and diabetic retinopathy.
Synthesis of 4-Acetylisocoumarin: First Total Syntheses of AGI-7 and Sescandelin
作者:Sanghee Kim、Gao-jun Fan、Jaekwang Lee、Jung Joon Lee、Deukjoon Kim
DOI:10.1021/jo010789b
日期:2002.5.1
A practical synthetic route to 4-acetylisocoumarins and the firsttotalsynthesis of AGI-7 (5) and sescandelin (4) are described. The readily available homophthalate 8 was transformed to the vinylogous amide ester 13 in high overall yield. Upon treatment of 13 with refluxing aqueous formic acid, the desired 4-acetylisocoumarin (5) and its regioisomer 3-methyl-4-formylisocoumarin (17) were produced